DESCRIPTION

The rocks program draws an animation of an asteroid field moving past
the observer (or vice versa). Sometimes the observer picks up spin on
Z axis.

OPTIONS

rocks accepts the following options:
-window Draw on a newly-created window. This is the default.
-root Draw on the root window.
-mono Make all the rocks the same color.
-ncolorscolors
How many different colors to use. Default 5. Colors are
chosen randomly.
-install
Install a private colormap for the window.
-visualvisual
Specify which visual to use. Legal values are the name of a
visual class, or the id number (decimal or hex) of a specific
visual.
-countinteger
Maximum number of rocks to draw on the screen at once. Default
100.
-speedinteger
A measure of the speed with which the observer and the rocks
pass each other, from 1 to 100. Default 100, meaning ‘‘very
fast.’’ If you’re on a slow display connection (the animation
looks jerky) then try making this number smaller, and/or
decreasing the number of rocks.
-delaymicroseconds
Number of microseconds to delay between each frame. Default
50000, meaning about 1/20th second. Compare and contrast with
-speed, above.
-norotate
Don’t rotate the observer; just fly through the field on the
level.
-nomove Don’t turn the observer; just fly straight ahead through the
field.
-3d Do red/blue 3d separations: if you look at the screen with 3d
glasses, the rocks will be jumping right out at you. Oooooh,
scaaary!

ENVIRONMENT

DISPLAY to get the default host and display number.
XENVIRONMENT
to get the name of a resource file that overrides the global
resources stored in the RESOURCE_MANAGER property.